u/612poko — reddlx

The compass will be small and round like in Starfield.
Fireballs will cast dynamic shadows.
REV-8 code will be reused for driving carts/horses/small boats.
You will be able to store stuff in your horse's saddlebags/cart and sell it to merchants directly from it, saving you trips to towns between clearing dungeons.
Player will be able to climb ledges.
Guards will be able to climb rooftops and jump between roofs while chasing you.
NPCs will be able to climb and jump in general.
There will be flying enemies that can properly navigate in 3D space instead of simply hovering above the ground and acting as if they were dirty ground pounders.
There will be ladders and NPCs will be able to use them.
Quickloot menu will be here, for the first time natively in TES game.
Building will be here, in one form or another. So will be the settlements.
Crafting will take after Fallout 4/76/Starfield, with items having slots where you can put various bonuses in exchange for various resources of progressively higher value. Traditional smiting/enchanting will be discarded.
Spell crafting will work the same way.
Coloured loot tiers will exist.
Legendary enemies will exist, with traits like in Free Lanes update.
RPG elements will exist.
There will be perks for hth/cooking/moving.
There will be debuffs acting like Afflictions from Starfield, requiring special treatment for each. You will receive them from enemy attacks/traps/enviromental damage.
Proc gen tech will be used for something. No idea what, but Bethesda never before discarded technology they've spent years developing.
Shader used for displaying ammo count will be reused for some fancy visual effect on some special weapon. Maybe scrolling daedric text on daedric weapons, I dunno.
Lock picking game will be new.